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气象卫星拍摄的云图含有大量关于大气和地球表面的气象信息。然而,在成像和传输过程中,由于运载器姿态的变化,传感器的非线性,地球自转,光照条件,大气扰动,信道噪声等多种因素的影响,使景物在云图中失去了本来的面目。只有经过图象处理,才能从中分析识别出更多的信息。云图的增强处理是图像处理的一个方面,它是利用图像增强技术把云图中有用的部分突出出来,使之清晰可辨,消弱或去掉那些无关或有害的内容。例如,对静止气象卫星云图进行多图像增强,可以获得云层运动的矢量场,将台风的形成和发展过程显示出来。 云图图像增强包括;(1)对比度增强,(2)图像
The cloud image taken by the meteorological satellite contains a great deal of meteorological information about the atmosphere and the Earth’s surface. However, in the process of imaging and transmission, due to the changes of the attitude of the vehicle, the nonlinearity of the sensor, the rotation of the earth, the illumination conditions, the atmospheric disturbance, the channel noise and other various factors, the scenery is lost in the cloud. Only after image processing can we analyze and identify more information. Enhancement of cloud images is one aspect of image processing. It uses image enhancement technology to highlight useful parts of a cloud image to make it legible and to eliminate or remove irrelevant or harmful content. For example, a multi-image enhancement of a stationary meteorological satellite imagery can obtain a vector field of cloud motion that shows the formation and development of a typhoon. Cloud image enhancement includes: (1) contrast enhancement, (2) image